I believe the last update to my removed EC2 supported direct auto tune. But it’s been too long ago. My EC3 auto tune works better but only tunes to a reasonable operating range. Fine tuning is done manually with wideband O2. Auto tune in descent with reduced power never worked well. But I suspect the constant speed prop added another variable. I don’t remember the lowest operating MP 10”-12” before fuel cutoff but I could easily hit that area if I closed the throttle too much during descent. Tracy added code to my EC3 to disallow any program changes for a few seconds after power up. At some point I had one fuel map address associated with current pressure that would reprogram itself to usually full lean. It was happening maybe 7 out of 10 power cycles. I hope you guys get the EC2/3 code working. I think many of us would like to see a production round of EC3 boards so we could have a tested spare.

I’m slowing working on the S21 FWF. It will be another 6-8 months before the airframe kit arrives.

Bobby

I think you have to have an EM2 along with EC2 in order for the Autotune to function. You use the buttons and bar graph to control and monitor the actions, Bobby would know better than me. David R. Cook RV6A Rotary
> On June 4, 2020 at 9:01 AM "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net> wrote:
>
>
> Hi Finn & all
>
> Can anyone using an EC2 confirm if the Autotune functions works for them?
> Not the autotune built into the EM3 engine monitor, the EC2 version.
>
> Thanks
>
> Steve Izett
>
> > On 2 Jun 2020, at 10:10 pm, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
> >
> > Hi Finn
> >
> > Thanks for the updated EC3 doc. I had an older version.
> >
> > Steve
> >
> >> On 2 Jun 2020, at 9:28 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
> >>
> >> Yes, after putting the EC3 into injector test mode and checking that each is clicking (screwdriver as stethoscope) and into ignition test mode and see that all four plugs are firing, that would be my next step.
> >>
> >> You say you've already checked that the wiring to coils and injectors are correct:
> >> J2-3 Prim Inj 1
> >> J2-4 Sec Inj 1
> >> ...
> >> J2-10 Trail Coil 1
> >> ...
> >>
> >> I continuously surprised myself on how often I'd wired something wrong, in spite of trying to be very careful about getting it right. I wasn't kidding about Murphy working overtime.
> >> It's easy to get the pin numbering wrong on the connectors.
> >>
> >> If I were getting desperate, I would remove (one at a time) the connectors on the injectors and coils and check continuity from J2 pin to the connector pin.
> >> (You know that the power side are correct because works with EC2)
> >> Finn
> >> Got the copper washers in the mail today, but think I'll wait for these:
> >> https://www.ebay.com/itm/293592023854
> >>
> >> On 6/1/2020 7:30 PM, Stephen Izett stephen.izett@gmail.com wrote:
> >>> Thanks Finn.
> >>>
> >>> I had a chance to unpack the dump last night and conquer with your reflection.
> >>> I’m in the dark re the EC3. Checked wiring twice now.
> >>> I must put a cro on the injectors and coils to confirm they are triggering correctly.
> >>>
> >>> Steve
> >>>
> >>>> On 1 Jun 2020, at 9:59 pm, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
> >>>>
> >>>> Program Mode 5 (Reset function)
> >>>>
> >>>> As of 01-25-13 the EC3 can be used with either the common narrowband O2 sensors or the more advanced wideband sensor systems. Be sure to verify that your wideband sensor outputs in the range of 0 - +5 volts if using a wideband type. To select the type in use, use the power up program mode method below:
> >>>>
> >>>> To select the O2 sensor type , perform the following steps:
> >>>>
> >>>> 1. Turn the EC3 power off.
> >>>> 2. Select mode 5 with the Mode Select switch
> >>>> 3. Select the O2 sensor type using the Cold Start switch: Up = Wideband, Down = Narrowband
> >>>> 4. Press and hold the Program Store switch.
> >>>> 5. While holding down the Program Store switch, turn on the power switch to the EC3.
> >>>> 6. Keep holding the Program Store switch for about 1 second, and then release it.
> >>>> 7. Return the Mode Select switch to 0.
> >>>> 8. Power the EC3 off. When the EC3 is powered up again it will be set for the O2 sensor type selected.
> >>>>
> >>>> Uploaded doc to:
> >>>> https://drive.google.com/drive/folders/1mVzPOxUwcGUlPizxnRF40nUyKBzfT4DC?usp=sharing
> >>>>
> >>>> PDF version still states that B is automatically programmed when A is programmed. Not true. Use the Word doc.
> >>>>
> >>>> Finn
> >>>>
> >>>>
> >>>> On 6/1/2020 9:16 AM, Stephen Izett stephen.izett@gmail.com wrote:
> >>>>> Hi Finn
> >>>>>
> >>>>> How does the mode 5 O2 sensor change work.
> >>>>> Ive not found this in the EC3 documentation.
> >>>>>
> >>>>> Steve
> >>>>>
> >>>>>> On 31 May 2020, at 4:08 am, Stephen Izett stephen.izett@gmail.com <flyrotary@lancaironline.net> wrote:
> >>>>>>
> >>>>>> Hi Finn
> >>>>>>
> >>>>>> Thats good news.
> >>>>>> At some point I’ll plug the EC3 in and see what the EM3 reports.
> >>>>>>
> >>>>>> We’re finally back in the air and testing again after the last 3 months of responding to COVID here in Perth.
> >>>>>>
> >>>>>> Last mods included some reshaping of inlets and diffusers and tidying up the inlet manifold (grinding smooth some weld that had penetrated into the runners).
> >>>>>>
> >>>>>> Yesterday our Renesis 4 port max fuel flow is up 10% to I think a reasonably accurate 18 gal/hr at 7100rpm, 29.5 inch of MAP and mixture at best power.
> >>>>>> We burn our Australian Premium Unleaded with no Ethanol which I believe is 6.26 lb/gal so I’m thinking thats around 190hp.
> >>>>>>
> >>>>>> Cheers
> >>>>>>
> >>>>>> Steve
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>>> On 31 May 2020, at 12:58 am, Finn Lassen finn.lassen@verizon.net <flyrotary@lancaironline.net> wrote:
> >>>>>>>
> >>>>>>> Wrong engine code solved!
> >>>>>>>
> >>>>>>> I looked at the dates of files in the EC3CL folder. These files were not updated to the date I programmed the EC3:
> >>>>>>> ECCL8.cof
> >>>>>>> ECCL8.map
> >>>>>>> ECCL8.O
> >>>>>>>
> >>>>>>> <mcppihngfoiehjon.png>
> >>>>>>>
> >>>>>>> So I started from scratch:
> >>>>>>>
> >>>>>>> Unzipped the EC3CL folder.
> >>>>>>>
> >>>>>>> Set ENG = A8; LS2COIL, LGSEC and WIDEBAND to 1 and rest to 0.
> >>>>>>>
> >>>>>>> Did "Erase", "Clean" and "Build All" and "Program" in MPLAB and reinstalled chip for controller A.
> >>>>>>>
> >>>>>>> Now EM3 correctly shows "A8" for engine code.
> >>>>>>>
> >>>>>>> Changed to narrow band using mode 5, and EM3 display correctly changed from 16 to 12 for ENGINFO.
> >>>>>>>
> >>>>>>> I must have chosen the "Make" option in MPLAB when I first programmed the chips, I guess.
> >>>>>>>
> >>>>>>> Unfortunately I must have damaged the controller B CPU chip when handling it (MPLAB reports device ID = 0) and will have to order a new one.
> >>>>>>>
> >>>>>>> Finn
> >>>>>>>
> >>>>>>> Still waiting for the $1.79 shipped copper washers to arrive in mail. Maybe I should bite the bullet and order five (six) Stat-O-Seal washer/O-rings at $8.56 per pack of two. $25.68 total :(
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